Hex Bolts & Cap Screws

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Expected delivery: Wed, Nov 18

Hex bolts and hex cap screws are the workhorse fasteners for machinery, structural brackets, truck bodies and equipment repair. This section covers inch sizes in UNC and UNF threads and metric sizes in class 8.8 and 10.9, with partial or full threads. Materials include Grade 2, Grade 5 and Grade 8 steel plus 18-8 and 316 stainless, in plain, zinc, yellow zinc and hot-dip galvanized finishes.

What to check before you order

• Grade or property class. Match the grade to the load. Grade 5 covers most equipment work, and Grade 8 is for high-stress joints such as suspension and heavy machinery. The hex bolt grades guide shows head markings.
• Thread pitch. A 1/2" bolt comes in 1/2"-13 coarse and 1/2"-20 fine. They will not interchange, so confirm the nut or tapped hole first.
• Length and thread length. Measure from under the head. Longer bolts are often partially threaded, which leaves a smooth shank in the shear plane.
• Finish. Hot-dip galvanized bolts need galvanized nuts, because the coating adds thickness to the threads.

Common questions

Is a Grade 8 bolt always the safer choice?

Not always. Grade 8 is stronger but less ductile than Grade 5. Use the grade the equipment maker or engineer specifies.

Pair your bolts with matching nuts and washers, or browse all fasteners.

Hex Bolts & Cap Screws: page 19

• Approved Vendor 3/8-16x1-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 22899 $1.46
• Approved Vendor 3/8-16x1-1/2" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 22900 $1.80
• Approved Vendor 3/8-16x1-1/2" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 22902 $1.19
• Approved Vendor 3/8-16x1-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 22903 $0.54
• Approved Vendor 3/8-16x1-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 22904 $1.01
• Approved Vendor 3/8-16x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 22905 $0.76
• Approved Vendor 3/8-16x1-1/2" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 22906 $0.66
• Approved Vendor 3/8-16x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1160 $1.04
• Approved Vendor 3/8-16x1-1/4" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2097 $1.89
• Approved Vendor 3/8-16x1-1/4" Brass Hex Tap Bolts Full Thread SKU 22924 $5.05
• Approved Vendor 3/8-16x1-1/4" Grade 5 Hex Flange Bolts Zinc Clear SKU 22928 $0.97
• Approved Vendor 3/8-16x1-1/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 22930 $0.94
• Approved Vendor 3/8-16x1-1/4" Grade 5 Serrated Hex Flange Bolts Zinc Yellow SKU 22931 $0.89
• Approved Vendor 3/8-16x1-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 22932 $1.25
• Approved Vendor 3/8-16x1-1/4" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 22933 $1.54
• Approved Vendor 3/8-16x1-1/4" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 22935 $1.10
• Approved Vendor 3/8-16x1-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 22936 $0.47
• Approved Vendor 3/8-16x1-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 22937 $0.87
• Approved Vendor 3/8-16x1-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 22938 $0.67
• Approved Vendor 3/8-16x1-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1159 $0.88
• Approved Vendor 3/8-16x1-3/4" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2099 $2.25
• Approved Vendor 3/8-16x1-3/4" Brass Hex Tap Bolts Full Thread SKU 22950 $6.68
• Approved Vendor 3/8-16x1-3/4" Grade 5 Hex Flange Bolts Zinc Clear SKU 22951 $1.23
• Approved Vendor 3/8-16x1-3/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 22953 $1.31
• Approved Vendor 3/8-16x1-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 22954 $1.81
• Approved Vendor 3/8-16x1-3/4" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 22955 $2.14
• Approved Vendor 3/8-16x1-3/4" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 22956 $1.42
• Approved Vendor 3/8-16x1-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 22957 $0.64
• Approved Vendor 3/8-16x1-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 22958 $1.14
• Approved Vendor 3/8-16x1-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 22959 $0.95
• Approved Vendor 3/8-16x1-3/4" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 22960 $0.83
• Approved Vendor 3/8-16x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1161 $1.17
• Approved Vendor 3/8-16x1/2" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2094 $1.58
• Approved Vendor 3/8-16x1/2" Brass Hex Tap Bolts Full Thread SKU 22974 $3.26
• Approved Vendor 3/8-16x1/2" Grade 5 Hex Flange Bolts Zinc Clear SKU 22975 $0.72
• Approved Vendor 3/8-16x1/2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 22976 $0.62
• Approved Vendor 3/8-16x1/2" Grade 5 Serrated Hex Flange Bolts Zinc Yellow SKU 22977 $0.65
• Approved Vendor 3/8-16x1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 22978 $0.36
• Approved Vendor 3/8-16x1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 22979 $0.61
• Approved Vendor 3/8-16x1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 22980 $0.56
• Approved Vendor 3/8-16x1/2" Stainless Steel Hex Cap Screws Bolts SKU 1154 $0.58
• Approved Vendor 3/8-16x2 1/4" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 22981 $2.54
• Approved Vendor 3/8-16x2" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2100 $2.48
• Approved Vendor 3/8-16x2" Brass Hex Tap Bolts Full Thread SKU 22992 $7.76
• Approved Vendor 3/8-16x2" Grade 5 Hex Flange Bolts Zinc Clear SKU 22993 $1.34
• Approved Vendor 3/8-16x2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 22995 $1.43
• Approved Vendor 3/8-16x2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 22996 $1.80
• Approved Vendor 3/8-16x2" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 22997 $2.11

More in Fasteners

• Socket Head Screws
• Machine Screws
• Nuts
• Wood, Deck & Sheet Metal Screws
• Pins, Clips & Retaining Rings
• Carriage & Specialty Bolts
• Washers
• Anchors
• Threaded Rod & Studs
• Rivets